Can you help me analyse this?

I love Caro-Kann with black. Usually I try to avoid 4..e6 as it locks in my bishop, instead I suggest 3. Qc7 and later on g6 - more in the spirit of the opening. 9.... Ne4 mistake. Puts you into an awkward position. Instead dc4 would have been about equal. 13. ... e3 looks tricky, but against a better oponent I would suggest Qf6. 15. Why didn't you play Nd4 - would have put you into big advantage. I consider Qd4 way worse... and in move 17 you should have taken the pawn - Rd8??? no sense.